Need help with vintage suzuki

Hey, im new to the forums and was wondering if someone could help me with my 1969 ts250. First off it has a good spark. I can't get her to run, but i can get her to fire for about half a second every once in a while. I have cleaned out the carb and same problem. I can put some has down the cylinder and it does sometimes do either a loud backfire or a half second fire. I can't even push start her, and i have tryed about 3 times for 200ft at a time. Does anyone know what i could do?

How long does it run when jump started? I would check the fuel and filter also. Lets stay with the basics. Is there oil in the oil injection tank. By the way how long has it been since it last ran anyway? I also would put in a new plug. When it runs is there oily gas mix coming out the exhaust pipe? To test teh compression with out a guage is problematic. You might just remove the plug and push your finger down into the hole and kick it over...or go to an AutoZone near you. They lent /rent out tools. Let me knoe you you make out.

ts 250

rule 1 to run the old girl needs spark and fuel I would pop the jug off ,check for scratches on piston if you can jump start her that easily your rings are history.They were reliable old scoots and cheap to fix,just stick to basics you should be alright I'll be on tomorrow if I can help ron

m.s. is right about the rings. If you can easily push start the bike in first gear then you more than likely have almost no compression. Even a smaller bike (with good compression) will lock the rear wheel if you try to push start in first gear. Buy or rent a compression tester and check it out.